Abstract: A fast carbonation process was developed to synthesis plate-like calcium carbonate in dilute lime slurry.
The influence of some process factors, such as the solid concentration of lime slurry, the orifice diameter of gas distributor, the flow rate of
CO₂, and the reaction temperature on the morphology of CaCO₃ was investigated. The experimental results and the thermodynamic calculation
indicate that lower pH, stronger absorbing of CO₂, and lower Ca²⁺/C_T values are favorable for the formation of plate-like CaCO₃.
The suitable carbonation conditions are as follows: <0.1%(m) of the solid concentration of lime slurry, 0.7～1.5mm of the orifice diameter of the gas
distributor, 100～400mL/min of CO₂ flow rate, and temperature 20～30℃.

Key words: plate-like calcium carbonate, carbonation, morphology control